Beyond VAC, most popular CSS community servers run . SMAC is smarter than VAC in some ways because it watches behavior , not just files. Even if you mask your file hashes, SMAC can detect that you never flinched at a flashbang (because you modded it out). It sees that your "vision" ignores 80% of smoke particles. Result: Automatic ban from that server community.
Today, a typical "css client mod cheat" suite includes: css client mod cheat